# uncompyle6 version 3.2.3
# Python bytecode 3.6 (3379)
# Decompiled from: Python 3.6.8 |Anaconda custom (64-bit)| (default, Feb 21 2019, 18:30:04) [MSC v.1916 64 bit (AMD64)]
# Embedded file name: site-packages\dateutil\rrule.py
"""
The rrule module offers a small, complete, and very fast, implementation of
the recurrence rules documented in the
`iCalendar RFC <http://www.ietf.org/rfc/rfc2445.txt>`_,
including support for caching of results.
"""
import itertools, datetime, calendar, sys

try:
    from math import gcd
except ImportError:
    from fractions import gcd

from six import advance_iterator, integer_types
from six.moves import _thread, range
import heapq
from ._common import weekday as weekdaybase
from warnings import warn

__all__ = [
    "rrule",
    "rruleset",
    "rrulestr",
    "YEARLY",
    "MONTHLY",
    "WEEKLY",
    "DAILY",
    "HOURLY",
    "MINUTELY",
    "SECONDLY",
    "MO",
    "TU",
    "WE",
    "TH",
    "FR",
    "SA",
    "SU",
]
M366MASK = tuple(
    [1] * 31
    + [2] * 29
    + [3] * 31
    + [4] * 30
    + [5] * 31
    + [6] * 30
    + [7] * 31
    + [8] * 31
    + [9] * 30
    + [10] * 31
    + [11] * 30
    + [12] * 31
    + [1] * 7
)
M365MASK = list(M366MASK)
M29, M30, M31 = list(range(1, 30)), list(range(1, 31)), list(range(1, 32))
MDAY366MASK = tuple(
    M31 + M29 + M31 + M30 + M31 + M30 + M31 + M31 + M30 + M31 + M30 + M31 + M31[:7]
)
MDAY365MASK = list(MDAY366MASK)
M29, M30, M31 = list(range(-29, 0)), list(range(-30, 0)), list(range(-31, 0))
NMDAY366MASK = tuple(
    M31 + M29 + M31 + M30 + M31 + M30 + M31 + M31 + M30 + M31 + M30 + M31 + M31[:7]
)
NMDAY365MASK = list(NMDAY366MASK)
M366RANGE = (0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366)
M365RANGE = (0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365)
WDAYMASK = [0, 1, 2, 3, 4, 5, 6] * 55
del M29
del M30
del M31
del M365MASK[59]
del MDAY365MASK[59]
del NMDAY365MASK[31]
MDAY365MASK = tuple(MDAY365MASK)
M365MASK = tuple(M365MASK)
FREQNAMES = ["YEARLY", "MONTHLY", "WEEKLY", "DAILY", "HOURLY", "MINUTELY", "SECONDLY"]
YEARLY, MONTHLY, WEEKLY, DAILY, HOURLY, MINUTELY, SECONDLY = list(range(7))
easter = None
parser = None


class weekday(weekdaybase):
    """
    This version of weekday does not allow n = 0.
    """

    def __init__(self, wkday, n=None):
        if n == 0:
            raise ValueError("Can't create weekday with n==0")
        super(weekday, self).__init__(wkday, n)


MO, TU, WE, TH, FR, SA, SU = weekdays = tuple((weekday(x) for x in range(7)))


def _invalidates_cache(f):
    """
    Decorator for rruleset methods which may invalidate the
    cached length.
    """

    def inner_func(self, *args, **kwargs):
        rv = f(self, *args, **kwargs)
        self._invalidate_cache()
        return rv

    return inner_func


class rrulebase(object):
    def __init__(self, cache=False):
        if cache:
            self._cache = []
            self._cache_lock = _thread.allocate_lock()
            self._invalidate_cache()
        else:
            self._cache = None
            self._cache_complete = False
            self._len = None

    def __iter__(self):
        if self._cache_complete:
            return iter(self._cache)
        elif self._cache is None:
            return self._iter()
        else:
            return self._iter_cached()

    def _invalidate_cache(self):
        if self._cache is not None:
            self._cache = []
            self._cache_complete = False
            self._cache_gen = self._iter()
            if self._cache_lock.locked():
                self._cache_lock.release()
        self._len = None

    def _iter_cached(self):
        i = 0
        gen = self._cache_gen
        cache = self._cache
        acquire = self._cache_lock.acquire
        release = self._cache_lock.release
        while gen and i == len(cache):
            acquire()
            if self._cache_complete:
                break
                try:
                    for j in range(10):
                        cache.append(advance_iterator(gen))

                except StopIteration:
                    self._cache_gen = gen = None
                    self._cache_complete = True
                    break

                release()
            yield cache[i]
            i += 1

        while i < self._len:
            yield cache[i]
            i += 1

    def __getitem__(self, item):
        if self._cache_complete:
            return self._cache[item]
        if isinstance(item, slice):
            if item.step:
                if item.step < 0:
                    return list(iter(self))[item]
                return list(
                    itertools.islice(
                        self, item.start or 0, item.stop or sys.maxsize, item.step or 1
                    )
                )
            else:
                if item >= 0:
                    gen = iter(self)
                    try:
                        for i in range(item + 1):
                            res = advance_iterator(gen)

                    except StopIteration:
                        raise IndexError

                    return res
                return list(iter(self))[item]

    def __contains__(self, item):
        if self._cache_complete:
            return item in self._cache
        else:
            for i in self:
                if i == item:
                    return True
                if i > item:
                    return False

            return False

    def count(self):
        """ Returns the number of recurrences in this set. It will have go
        trough the whole recurrence, if this hasn't been done before. """
        if self._len is None:
            for x in self:
                pass

        return self._len

    def before(self, dt, inc=False):
        """ Returns the last recurrence before the given datetime instance. The
        inc keyword defines what happens if dt is an occurrence. With
        inc=True, if dt itself is an occurrence, it will be returned. """
        if self._cache_complete:
            gen = self._cache
        else:
            gen = self
        last = None
        if inc:
            for i in gen:
                if i > dt:
                    break
                last = i

        else:
            for i in gen:
                if i >= dt:
                    break
                last = i

        return last

    def after(self, dt, inc=False):
        """ Returns the first recurrence after the given datetime instance. The
        inc keyword defines what happens if dt is an occurrence. With
        inc=True, if dt itself is an occurrence, it will be returned.  """
        if self._cache_complete:
            gen = self._cache
        else:
            gen = self
        if inc:
            for i in gen:
                if i >= dt:
                    return i

        else:
            for i in gen:
                if i > dt:
                    return i

    def xafter(self, dt, count=None, inc=False):
        """
        Generator which yields up to `count` recurrences after the given
        datetime instance, equivalent to `after`.
        
        :param dt:
            The datetime at which to start generating recurrences.
        
        :param count:
            The maximum number of recurrences to generate. If `None` (default),
            dates are generated until the recurrence rule is exhausted.
        
        :param inc:
            If `dt` is an instance of the rule and `inc` is `True`, it is
            included in the output.
        
        :yields: Yields a sequence of `datetime` objects.
        """
        if self._cache_complete:
            gen = self._cache
        else:
            gen = self
        if inc:
            comp = lambda dc, dtc: dc >= dtc
        else:
            comp = lambda dc, dtc: dc > dtc
        n = 0
        for d in gen:
            if comp(d, dt):
                if count is not None:
                    n += 1
                    if n > count:
                        break
                yield d

    def between(self, after, before, inc=False, count=1):
        """ Returns all the occurrences of the rrule between after and before.
        The inc keyword defines what happens if after and/or before are
        themselves occurrences. With inc=True, they will be included in the
        list, if they are found in the recurrence set. """
        if self._cache_complete:
            gen = self._cache
        else:
            gen = self
        started = False
        l = []
        if inc:
            for i in gen:
                if i > before:
                    break
                else:
                    if not started:
                        if i >= after:
                            started = True
                            l.append(i)
                        else:
                            l.append(i)

        else:
            for i in gen:
                if i >= before:
                    break
                else:
                    if not started:
                        if i > after:
                            started = True
                            l.append(i)
                        else:
                            l.append(i)

        return l


class rrule(rrulebase):
    """
    That's the base of the rrule operation. It accepts all the keywords
    defined in the RFC as its constructor parameters (except byday,
    which was renamed to byweekday) and more. The constructor prototype is::
    
            rrule(freq)
    
    Where freq must be one of YEARLY, MONTHLY, WEEKLY, DAILY, HOURLY, MINUTELY,
    or SECONDLY.
    
    .. note::
        Per RFC section 3.3.10, recurrence instances falling on invalid dates
        and times are ignored rather than coerced:
    
            Recurrence rules may generate recurrence instances with an invalid
            date (e.g., February 30) or nonexistent local time (e.g., 1:30 AM
            on a day where the local time is moved forward by an hour at 1:00
            AM).  Such recurrence instances MUST be ignored and MUST NOT be
            counted as part of the recurrence set.
    
        This can lead to possibly surprising behavior when, for example, the
        start date occurs at the end of the month:
    
        >>> from dateutil.rrule import rrule, MONTHLY
        >>> from datetime import datetime
        >>> start_date = datetime(2014, 12, 31)
        >>> list(rrule(freq=MONTHLY, count=4, dtstart=start_date))
        ... # doctest: +NORMALIZE_WHITESPACE
        [datetime.datetime(2014, 12, 31, 0, 0),
         datetime.datetime(2015, 1, 31, 0, 0),
         datetime.datetime(2015, 3, 31, 0, 0),
         datetime.datetime(2015, 5, 31, 0, 0)]
    
    Additionally, it supports the following keyword arguments:
    
    :param cache:
        If given, it must be a boolean value specifying to enable or disable
        caching of results. If you will use the same rrule instance multiple
        times, enabling caching will improve the performance considerably.
    :param dtstart:
        The recurrence start. Besides being the base for the recurrence,
        missing parameters in the final recurrence instances will also be
        extracted from this date. If not given, datetime.now() will be used
        instead.
    :param interval:
        The interval between each freq iteration. For example, when using
        YEARLY, an interval of 2 means once every two years, but with HOURLY,
        it means once every two hours. The default interval is 1.
    :param wkst:
        The week start day. Must be one of the MO, TU, WE constants, or an
        integer, specifying the first day of the week. This will affect
        recurrences based on weekly periods. The default week start is got
        from calendar.firstweekday(), and may be modified by
        calendar.setfirstweekday().
    :param count:
        How many occurrences will be generated.
    
        .. note::
            As of version 2.5.0, the use of the ``until`` keyword together
            with the ``count`` keyword is deprecated per RFC-2445 Sec. 4.3.10.
    :param until:
        If given, this must be a datetime instance, that will specify the
        limit of the recurrence. The last recurrence in the rule is the greatest
        datetime that is less than or equal to the value specified in the
        ``until`` parameter.
    
        .. note::
            As of version 2.5.0, the use of the ``until`` keyword together
            with the ``count`` keyword is deprecated per RFC-2445 Sec. 4.3.10.
    :param bysetpos:
        If given, it must be either an integer, or a sequence of integers,
        positive or negative. Each given integer will specify an occurrence
        number, corresponding to the nth occurrence of the rule inside the
        frequency period. For example, a bysetpos of -1 if combined with a
        MONTHLY frequency, and a byweekday of (MO, TU, WE, TH, FR), will
        result in the last work day of every month.
    :param bymonth:
        If given, it must be either an integer, or a sequence of integers,
        meaning the months to apply the recurrence to.
    :param bymonthday:
        If given, it must be either an integer, or a sequence of integers,
        meaning the month days to apply the recurrence to.
    :param byyearday:
        If given, it must be either an integer, or a sequence of integers,
        meaning the year days to apply the recurrence to.
    :param byweekno:
        If given, it must be either an integer, or a sequence of integers,
        meaning the week numbers to apply the recurrence to. Week numbers
        have the meaning described in ISO8601, that is, the first week of
        the year is that containing at least four days of the new year.
    :param byweekday:
        If given, it must be either an integer (0 == MO), a sequence of
        integers, one of the weekday constants (MO, TU, etc), or a sequence
        of these constants. When given, these variables will define the
        weekdays where the recurrence will be applied. It's also possible to
        use an argument n for the weekday instances, which will mean the nth
        occurrence of this weekday in the period. For example, with MONTHLY,
        or with YEARLY and BYMONTH, using FR(+1) in byweekday will specify the
        first friday of the month where the recurrence happens. Notice that in
        the RFC documentation, this is specified as BYDAY, but was renamed to
        avoid the ambiguity of that keyword.
    :param byhour:
        If given, it must be either an integer, or a sequence of integers,
        meaning the hours to apply the recurrence to.
    :param byminute:
        If given, it must be either an integer, or a sequence of integers,
        meaning the minutes to apply the recurrence to.
    :param bysecond:
        If given, it must be either an integer, or a sequence of integers,
        meaning the seconds to apply the recurrence to.
    :param byeaster:
        If given, it must be either an integer, or a sequence of integers,
        positive or negative. Each integer will define an offset from the
        Easter Sunday. Passing the offset 0 to byeaster will yield the Easter
        Sunday itself. This is an extension to the RFC specification.
     """

    def __init__(
        self,
        freq,
        dtstart=None,
        interval=1,
        wkst=None,
        count=None,
        until=None,
        bysetpos=None,
        bymonth=None,
        bymonthday=None,
        byyearday=None,
        byeaster=None,
        byweekno=None,
        byweekday=None,
        byhour=None,
        byminute=None,
        bysecond=None,
        cache=False,
    ):
        global easter
        super(rrule, self).__init__(cache)
        if not dtstart:
            dtstart = datetime.datetime.now().replace(microsecond=0)
        else:
            if not isinstance(dtstart, datetime.datetime):
                dtstart = datetime.datetime.fromordinal(dtstart.toordinal())
            else:
                dtstart = dtstart.replace(microsecond=0)
            self._dtstart = dtstart
            self._tzinfo = dtstart.tzinfo
            self._freq = freq
            self._interval = interval
            self._count = count
            self._original_rule = {}
            if until:
                if not isinstance(until, datetime.datetime):
                    until = datetime.datetime.fromordinal(until.toordinal())
            self._until = until
            if count is not None:
                if until:
                    warn(
                        "Using both 'count' and 'until' is inconsistent with RFC 2445 and has been deprecated in dateutil. Future versions will raise an error.",
                        DeprecationWarning,
                    )
            if wkst is None:
                self._wkst = calendar.firstweekday()
            else:
                if isinstance(wkst, integer_types):
                    self._wkst = wkst
                else:
                    self._wkst = wkst.weekday
                if bysetpos is None:
                    self._bysetpos = None
                else:
                    if isinstance(bysetpos, integer_types):
                        if bysetpos == 0 or not -366 <= bysetpos <= 366:
                            raise ValueError(
                                "bysetpos must be between 1 and 366, or between -366 and -1"
                            )
                        self._bysetpos = (bysetpos,)
                    else:
                        self._bysetpos = tuple(bysetpos)
                        for pos in self._bysetpos:
                            if pos == 0 or not -366 <= pos <= 366:
                                raise ValueError(
                                    "bysetpos must be between 1 and 366, or between -366 and -1"
                                )

                    if self._bysetpos:
                        self._original_rule["bysetpos"] = self._bysetpos
                    if byweekno is None:
                        if byyearday is None:
                            if bymonthday is None:
                                if byweekday is None:
                                    if byeaster is None:
                                        pass
        if freq == YEARLY:
            if bymonth is None:
                bymonth = dtstart.month
                self._original_rule["bymonth"] = None
            bymonthday = dtstart.day
            self._original_rule["bymonthday"] = None
        else:
            if freq == MONTHLY:
                bymonthday = dtstart.day
                self._original_rule["bymonthday"] = None
            else:
                if freq == WEEKLY:
                    byweekday = dtstart.weekday()
                    self._original_rule["byweekday"] = None
            if bymonth is None:
                self._bymonth = None
            else:
                if isinstance(bymonth, integer_types):
                    bymonth = (bymonth,)
                self._bymonth = tuple(sorted(set(bymonth)))
                if "bymonth" not in self._original_rule:
                    self._original_rule["bymonth"] = self._bymonth
            if byyearday is None:
                self._byyearday = None
            else:
                if isinstance(byyearday, integer_types):
                    byyearday = (byyearday,)
                self._byyearday = tuple(sorted(set(byyearday)))
                self._original_rule["byyearday"] = self._byyearday
            if byeaster is not None:
                if not easter:
                    from dateutil import easter
                if isinstance(byeaster, integer_types):
                    self._byeaster = (byeaster,)
                else:
                    self._byeaster = tuple(sorted(byeaster))
                self._original_rule["byeaster"] = self._byeaster
            else:
                self._byeaster = None
            if bymonthday is None:
                self._bymonthday = ()
                self._bynmonthday = ()
            else:
                if isinstance(bymonthday, integer_types):
                    bymonthday = (bymonthday,)
                bymonthday = set(bymonthday)
                self._bymonthday = tuple(sorted((x for x in bymonthday if x > 0)))
                self._bynmonthday = tuple(sorted((x for x in bymonthday if x < 0)))
                if "bymonthday" not in self._original_rule:
                    self._original_rule["bymonthday"] = tuple(
                        itertools.chain(self._bymonthday, self._bynmonthday)
                    )
            if byweekno is None:
                self._byweekno = None
            else:
                if isinstance(byweekno, integer_types):
                    byweekno = (byweekno,)
                self._byweekno = tuple(sorted(set(byweekno)))
                self._original_rule["byweekno"] = self._byweekno
            if byweekday is None:
                self._byweekday = None
                self._bynweekday = None
            else:
                if isinstance(byweekday, integer_types) or hasattr(byweekday, "n"):
                    byweekday = (byweekday,)
                self._byweekday = set()
                self._bynweekday = set()
                for wday in byweekday:
                    if isinstance(wday, integer_types):
                        self._byweekday.add(wday)
                    else:
                        if not wday.n or freq > MONTHLY:
                            self._byweekday.add(wday.weekday)
                        else:
                            self._bynweekday.add((wday.weekday, wday.n))

                if not self._byweekday:
                    self._byweekday = None
                else:
                    if not self._bynweekday:
                        self._bynweekday = None
                if self._byweekday is not None:
                    self._byweekday = tuple(sorted(self._byweekday))
                    orig_byweekday = [weekday(x) for x in self._byweekday]
                else:
                    orig_byweekday = tuple()
                if self._bynweekday is not None:
                    self._bynweekday = tuple(sorted(self._bynweekday))
                    orig_bynweekday = [weekday(*x) for x in self._bynweekday]
                else:
                    orig_bynweekday = tuple()
                if "byweekday" not in self._original_rule:
                    self._original_rule["byweekday"] = tuple(
                        itertools.chain(orig_byweekday, orig_bynweekday)
                    )
            if byhour is None:
                if freq < HOURLY:
                    self._byhour = set((dtstart.hour,))
                else:
                    self._byhour = None
            else:
                if isinstance(byhour, integer_types):
                    byhour = (byhour,)
                if freq == HOURLY:
                    self._byhour = self._rrule__construct_byset(
                        start=dtstart.hour, byxxx=byhour, base=24
                    )
                else:
                    self._byhour = set(byhour)
                self._byhour = tuple(sorted(self._byhour))
                self._original_rule["byhour"] = self._byhour
            if byminute is None:
                if freq < MINUTELY:
                    self._byminute = set((dtstart.minute,))
                else:
                    self._byminute = None
            else:
                if isinstance(byminute, integer_types):
                    byminute = (byminute,)
                if freq == MINUTELY:
                    self._byminute = self._rrule__construct_byset(
                        start=dtstart.minute, byxxx=byminute, base=60
                    )
                else:
                    self._byminute = set(byminute)
                self._byminute = tuple(sorted(self._byminute))
                self._original_rule["byminute"] = self._byminute
            if bysecond is None:
                if freq < SECONDLY:
                    self._bysecond = (dtstart.second,)
                else:
                    self._bysecond = None
            else:
                if isinstance(bysecond, integer_types):
                    bysecond = (bysecond,)
                self._bysecond = set(bysecond)
                if freq == SECONDLY:
                    self._bysecond = self._rrule__construct_byset(
                        start=dtstart.second, byxxx=bysecond, base=60
                    )
                else:
                    self._bysecond = set(bysecond)
                self._bysecond = tuple(sorted(self._bysecond))
                self._original_rule["bysecond"] = self._bysecond
            if self._freq >= HOURLY:
                self._timeset = None
            else:
                self._timeset = []
                for hour in self._byhour:
                    for minute in self._byminute:
                        for second in self._bysecond:
                            self._timeset.append(
                                datetime.time(hour, minute, second, tzinfo=self._tzinfo)
                            )

                self._timeset.sort()
                self._timeset = tuple(self._timeset)

    def __str__(self):
        """
        Output a string that would generate this RRULE if passed to rrulestr.
        This is mostly compatible with RFC2445, except for the
        dateutil-specific extension BYEASTER.
        """
        output = []
        h, m, s = [None] * 3
        if self._dtstart:
            output.append(self._dtstart.strftime("DTSTART:%Y%m%dT%H%M%S"))
            h, m, s = self._dtstart.timetuple()[3:6]
        parts = ["FREQ=" + FREQNAMES[self._freq]]
        if self._interval != 1:
            parts.append("INTERVAL=" + str(self._interval))
        if self._wkst:
            parts.append("WKST=" + repr(weekday(self._wkst))[0:2])
        if self._count is not None:
            parts.append("COUNT=" + str(self._count))
        if self._until:
            parts.append(self._until.strftime("UNTIL=%Y%m%dT%H%M%S"))
        if self._original_rule.get("byweekday") is not None:
            original_rule = dict(self._original_rule)
            wday_strings = []
            for wday in original_rule["byweekday"]:
                if wday.n:
                    wday_strings.append(
                        ("{n:+d}{wday}").format(n=wday.n, wday=repr(wday)[0:2])
                    )
                else:
                    wday_strings.append(repr(wday))

            original_rule["byweekday"] = wday_strings
        else:
            original_rule = self._original_rule
        partfmt = "{name}={vals}"
        for name, key in (
            ("BYSETPOS", "bysetpos"),
            ("BYMONTH", "bymonth"),
            ("BYMONTHDAY", "bymonthday"),
            ("BYYEARDAY", "byyearday"),
            ("BYWEEKNO", "byweekno"),
            ("BYDAY", "byweekday"),
            ("BYHOUR", "byhour"),
            ("BYMINUTE", "byminute"),
            ("BYSECOND", "bysecond"),
            ("BYEASTER", "byeaster"),
        ):
            value = original_rule.get(key)
            if value:
                parts.append(
                    partfmt.format(name=name, vals=(",").join((str(v) for v in value)))
                )

        output.append((";").join(parts))
        return ("\n").join(output)

    def replace(self, **kwargs):
        """Return new rrule with same attributes except for those attributes given new
        values by whichever keyword arguments are specified."""
        new_kwargs = {
            "interval": self._interval,
            "count": self._count,
            "dtstart": self._dtstart,
            "freq": self._freq,
            "until": self._until,
            "wkst": self._wkst,
            "cache": False if self._cache is None else True,
        }
        new_kwargs.update(self._original_rule)
        new_kwargs.update(kwargs)
        return rrule(**new_kwargs)

    def _iter(self):
        year, month, day, hour, minute, second, weekday, yearday, _ = (
            self._dtstart.timetuple()
        )
        freq = self._freq
        interval = self._interval
        wkst = self._wkst
        until = self._until
        bymonth = self._bymonth
        byweekno = self._byweekno
        byyearday = self._byyearday
        byweekday = self._byweekday
        byeaster = self._byeaster
        bymonthday = self._bymonthday
        bynmonthday = self._bynmonthday
        bysetpos = self._bysetpos
        byhour = self._byhour
        byminute = self._byminute
        bysecond = self._bysecond
        ii = _iterinfo(self)
        ii.rebuild(year, month)
        getdayset = {
            YEARLY: ii.ydayset,
            MONTHLY: ii.mdayset,
            WEEKLY: ii.wdayset,
            DAILY: ii.ddayset,
            HOURLY: ii.ddayset,
            MINUTELY: ii.ddayset,
            SECONDLY: ii.ddayset,
        }[freq]
        if freq < HOURLY:
            timeset = self._timeset
        else:
            gettimeset = {
                HOURLY: ii.htimeset,
                MINUTELY: ii.mtimeset,
                SECONDLY: ii.stimeset,
            }[freq]
            if (
                freq >= HOURLY
                and self._byhour
                and hour not in self._byhour
                or freq >= MINUTELY
                and self._byminute
                and minute not in self._byminute
                or freq >= SECONDLY
                and self._bysecond
                and second not in self._bysecond
            ):
                timeset = ()
            else:
                timeset = gettimeset(hour, minute, second)
            total = 0
            count = self._count
            while 1:
                dayset, start, end = getdayset(year, month, day)
                filtered = False
                for i in dayset[start:end]:
                    if (
                        bymonth
                        and ii.mmask[i] not in bymonth
                        or byweekno
                        and not ii.wnomask[i]
                        or byweekday
                        and ii.wdaymask[i] not in byweekday
                        or ii.nwdaymask
                        and not ii.nwdaymask[i]
                        or byeaster
                        and not ii.eastermask[i]
                        or (bymonthday or bynmonthday)
                        and ii.mdaymask[i] not in bymonthday
                        and ii.nmdaymask[i] not in bynmonthday
                        or byyearday
                        and (
                            i < ii.yearlen
                            and i + 1 not in byyearday
                            and -ii.yearlen + i not in byyearday
                            or i >= ii.yearlen
                            and i + 1 - ii.yearlen not in byyearday
                            and -ii.nextyearlen + i - ii.yearlen not in byyearday
                        )
                    ):
                        dayset[i] = None
                        filtered = True

                if bysetpos:
                    if timeset:
                        poslist = []
                        for pos in bysetpos:
                            if pos < 0:
                                daypos, timepos = divmod(pos, len(timeset))
                            else:
                                daypos, timepos = divmod(pos - 1, len(timeset))
                            try:
                                i = [x for x in dayset[start:end] if x is not None][
                                    daypos
                                ]
                                time = timeset[timepos]
                            except IndexError:
                                pass
                            else:
                                date = datetime.date.fromordinal(ii.yearordinal + i)
                                res = datetime.datetime.combine(date, time)
                                if res not in poslist:
                                    poslist.append(res)

                        poslist.sort()
                        for res in poslist:
                            if until:
                                if res > until:
                                    self._len = total
                                    return
                                if res >= self._dtstart:
                                    if count is not None:
                                        count -= 1
                                        if count < 0:
                                            self._len = total
                                            return
                                        total += 1
                                        yield res

                    for i in dayset[start:end]:
                        if i is not None:
                            date = datetime.date.fromordinal(ii.yearordinal + i)
                            for time in timeset:
                                res = datetime.datetime.combine(date, time)
                                if until:
                                    if res > until:
                                        self._len = total
                                        return
                                    if res >= self._dtstart:
                                        if count is not None:
                                            count -= 1
                                            if count < 0:
                                                self._len = total
                                                return
                                            total += 1
                                            yield res

                fixday = False
                if freq == YEARLY:
                    year += interval
                    if year > datetime.MAXYEAR:
                        self._len = total
                        return
                    ii.rebuild(year, month)
                else:
                    if freq == MONTHLY:
                        pass
                month += interval
                if month > 12:
                    div, mod = divmod(month, 12)
                    month = mod
                    year += div
                    if month == 0:
                        month = 12
                        year -= 1
                    if year > datetime.MAXYEAR:
                        self._len = total
                        return
                    ii.rebuild(year, month)
                else:
                    if freq == WEEKLY:
                        if wkst > weekday:
                            day += -(weekday + 1 + (6 - wkst)) + self._interval * 7
                        else:
                            day += -(weekday - wkst) + self._interval * 7
                        weekday = wkst
                        fixday = True
                    else:
                        if freq == DAILY:
                            day += interval
                            fixday = True
                        else:
                            if freq == HOURLY:
                                if filtered:
                                    hour += (23 - hour) // interval * interval
                                if byhour:
                                    ndays, hour = self._rrule__mod_distance(
                                        value=hour, byxxx=self._byhour, base=24
                                    )
                                else:
                                    ndays, hour = divmod(hour + interval, 24)
                                if ndays:
                                    day += ndays
                                    fixday = True
                                timeset = gettimeset(hour, minute, second)
                            else:
                                if freq == MINUTELY:
                                    if filtered:
                                        minute += (
                                            (1439 - (hour * 60 + minute))
                                            // interval
                                            * interval
                                        )
                                    valid = False
                                    rep_rate = 1440
                                    for j in range(rep_rate // gcd(interval, rep_rate)):
                                        if byminute:
                                            nhours, minute = self._rrule__mod_distance(
                                                value=minute,
                                                byxxx=self._byminute,
                                                base=60,
                                            )
                                        else:
                                            nhours, minute = divmod(
                                                minute + interval, 60
                                            )
                                        div, hour = divmod(hour + nhours, 24)
                                        if div:
                                            day += div
                                            fixday = True
                                            filtered = False
                                        if not byhour or hour in byhour:
                                            valid = True
                                            break

                                    if not valid:
                                        raise ValueError(
                                            "Invalid combination of interval and "
                                            + "byhour resulting in empty rule."
                                        )
                                    timeset = gettimeset(hour, minute, second)
                                else:
                                    if freq == SECONDLY:
                                        if filtered:
                                            second += (
                                                (
                                                    86399
                                                    - (
                                                        hour * 3600
                                                        + minute * 60
                                                        + second
                                                    )
                                                )
                                                // interval
                                                * interval
                                            )
                                        rep_rate = 86400
                                        valid = False
                                        for j in range(
                                            0, rep_rate // gcd(interval, rep_rate)
                                        ):
                                            if bysecond:
                                                nminutes, second = self._rrule__mod_distance(
                                                    value=second,
                                                    byxxx=self._bysecond,
                                                    base=60,
                                                )
                                            else:
                                                nminutes, second = divmod(
                                                    second + interval, 60
                                                )
                                            div, minute = divmod(minute + nminutes, 60)
                                            if div:
                                                hour += div
                                                div, hour = divmod(hour, 24)
                                                if div:
                                                    day += div
                                                    fixday = True
                                            if not byhour or hour in byhour:
                                                if not byminute or minute in byminute:
                                                    if (
                                                        not bysecond
                                                        or second in bysecond
                                                    ):
                                                        valid = True
                                                        break

                                        if not valid:
                                            raise ValueError(
                                                "Invalid combination of interval, "
                                                + "byhour and byminute resulting in empty"
                                                + " rule."
                                            )
                                        timeset = gettimeset(hour, minute, second)
                if fixday:
                    if day > 28:
                        daysinmonth = calendar.monthrange(year, month)[1]
                        if day > daysinmonth:
                            while day > daysinmonth:
                                day -= daysinmonth
                                month += 1
                                if month == 13:
                                    month = 1
                                    year += 1
                                    if year > datetime.MAXYEAR:
                                        self._len = total
                                        return
                                    daysinmonth = calendar.monthrange(year, month)[1]

                            ii.rebuild(year, month)

    def __construct_byset(self, start, byxxx, base):
        """
        If a `BYXXX` sequence is passed to the constructor at the same level as
        `FREQ` (e.g. `FREQ=HOURLY,BYHOUR={2,4,7},INTERVAL=3`), there are some
        specifications which cannot be reached given some starting conditions.
        
        This occurs whenever the interval is not coprime with the base of a
        given unit and the difference between the starting position and the
        ending position is not coprime with the greatest common denominator
        between the interval and the base. For example, with a FREQ of hourly
        starting at 17:00 and an interval of 4, the only valid values for
        BYHOUR would be {21, 1, 5, 9, 13, 17}, because 4 and 24 are not
        coprime.
        
        :param start:
            Specifies the starting position.
        :param byxxx:
            An iterable containing the list of allowed values.
        :param base:
            The largest allowable value for the specified frequency (e.g.
            24 hours, 60 minutes).
        
        This does not preserve the type of the iterable, returning a set, since
        the values should be unique and the order is irrelevant, this will
        speed up later lookups.
        
        In the event of an empty set, raises a :exception:`ValueError`, as this
        results in an empty rrule.
        """
        cset = set()
        if isinstance(byxxx, integer_types):
            byxxx = (byxxx,)
        for num in byxxx:
            i_gcd = gcd(self._interval, base)
            if i_gcd == 1 or divmod(num - start, i_gcd)[1] == 0:
                cset.add(num)

        if len(cset) == 0:
            raise ValueError("Invalid rrule byxxx generates an empty set.")
        return cset

    def __mod_distance(self, value, byxxx, base):
        """
        Calculates the next value in a sequence where the `FREQ` parameter is
        specified along with a `BYXXX` parameter at the same "level"
        (e.g. `HOURLY` specified with `BYHOUR`).
        
        :param value:
            The old value of the component.
        :param byxxx:
            The `BYXXX` set, which should have been generated by
            `rrule._construct_byset`, or something else which checks that a
            valid rule is present.
        :param base:
            The largest allowable value for the specified frequency (e.g.
            24 hours, 60 minutes).
        
        If a valid value is not found after `base` iterations (the maximum
        number before the sequence would start to repeat), this raises a
        :exception:`ValueError`, as no valid values were found.
        
        This returns a tuple of `divmod(n*interval, base)`, where `n` is the
        smallest number of `interval` repetitions until the next specified
        value in `byxxx` is found.
        """
        accumulator = 0
        for ii in range(1, base + 1):
            div, value = divmod(value + self._interval, base)
            accumulator += div
            if value in byxxx:
                return (accumulator, value)


class _iterinfo(object):
    __slots__ = [
        "rrule",
        "lastyear",
        "lastmonth",
        "yearlen",
        "nextyearlen",
        "yearordinal",
        "yearweekday",
        "mmask",
        "mrange",
        "mdaymask",
        "nmdaymask",
        "wdaymask",
        "wnomask",
        "nwdaymask",
        "eastermask",
    ]

    def __init__(self, rrule):
        for attr in self.__slots__:
            setattr(self, attr, None)

        self.rrule = rrule

    def rebuild(self, year, month):
        rr = self.rrule
        if year != self.lastyear:
            self.yearlen = 365 + calendar.isleap(year)
            self.nextyearlen = 365 + calendar.isleap(year + 1)
            firstyday = datetime.date(year, 1, 1)
            self.yearordinal = firstyday.toordinal()
            self.yearweekday = firstyday.weekday()
            wday = datetime.date(year, 1, 1).weekday()
            if self.yearlen == 365:
                self.mmask = M365MASK
                self.mdaymask = MDAY365MASK
                self.nmdaymask = NMDAY365MASK
                self.wdaymask = WDAYMASK[wday:]
                self.mrange = M365RANGE
            else:
                self.mmask = M366MASK
                self.mdaymask = MDAY366MASK
                self.nmdaymask = NMDAY366MASK
                self.wdaymask = WDAYMASK[wday:]
                self.mrange = M366RANGE
            if not rr._byweekno:
                self.wnomask = None
            else:
                self.wnomask = [0] * (self.yearlen + 7)
                no1wkst = firstwkst = (7 - self.yearweekday + rr._wkst) % 7
                if no1wkst >= 4:
                    no1wkst = 0
                    wyearlen = self.yearlen + (self.yearweekday - rr._wkst) % 7
                else:
                    wyearlen = self.yearlen - no1wkst
                div, mod = divmod(wyearlen, 7)
                numweeks = div + mod // 4
                for n in rr._byweekno:
                    if n < 0:
                        n += numweeks + 1
                    if not 0 < n <= numweeks:
                        continue
                    if n > 1:
                        i = no1wkst + (n - 1) * 7
                        if no1wkst != firstwkst:
                            i -= 7 - firstwkst
                        else:
                            i = no1wkst
                        for j in range(7):
                            self.wnomask[i] = 1
                            i += 1
                            if self.wdaymask[i] == rr._wkst:
                                break

                if 1 in rr._byweekno:
                    i = no1wkst + numweeks * 7
                    if no1wkst != firstwkst:
                        i -= 7 - firstwkst
                    if i < self.yearlen:
                        for j in range(7):
                            self.wnomask[i] = 1
                            i += 1
                            if self.wdaymask[i] == rr._wkst:
                                break

                if no1wkst:
                    if -1 not in rr._byweekno:
                        lyearweekday = datetime.date(year - 1, 1, 1).weekday()
                        lno1wkst = (7 - lyearweekday + rr._wkst) % 7
                        lyearlen = 365 + calendar.isleap(year - 1)
                        if lno1wkst >= 4:
                            lno1wkst = 0
                            lnumweeks = (
                                52 + (lyearlen + (lyearweekday - rr._wkst) % 7) % 7 // 4
                            )
                        else:
                            lnumweeks = 52 + (self.yearlen - no1wkst) % 7 // 4
                    else:
                        lnumweeks = -1
                    if lnumweeks in rr._byweekno:
                        for i in range(no1wkst):
                            self.wnomask[i] = 1

            if rr._bynweekday:
                if month != self.lastmonth or year != self.lastyear:
                    ranges = []
                    if rr._freq == YEARLY:
                        if rr._bymonth:
                            for month in rr._bymonth:
                                ranges.append(self.mrange[month - 1 : month + 1])

                        else:
                            ranges = [(0, self.yearlen)]
                    else:
                        if rr._freq == MONTHLY:
                            ranges = [self.mrange[month - 1 : month + 1]]
                    if ranges:
                        self.nwdaymask = [0] * self.yearlen
                        for first, last in ranges:
                            last -= 1
                            for wday, n in rr._bynweekday:
                                if n < 0:
                                    i = last + (n + 1) * 7
                                    i -= (self.wdaymask[i] - wday) % 7
                                else:
                                    i = first + (n - 1) * 7
                                    i += (7 - self.wdaymask[i] + wday) % 7
                                if first <= i <= last:
                                    self.nwdaymask[i] = 1

            if rr._byeaster:
                self.eastermask = [0] * (self.yearlen + 7)
                eyday = easter.easter(year).toordinal() - self.yearordinal
                for offset in rr._byeaster:
                    self.eastermask[eyday + offset] = 1

            self.lastyear = year
            self.lastmonth = month

    def ydayset(self, year, month, day):
        return (list(range(self.yearlen)), 0, self.yearlen)

    def mdayset(self, year, month, day):
        dset = [None] * self.yearlen
        start, end = self.mrange[month - 1 : month + 1]
        for i in range(start, end):
            dset[i] = i

        return (dset, start, end)

    def wdayset(self, year, month, day):
        dset = [None] * (self.yearlen + 7)
        i = datetime.date(year, month, day).toordinal() - self.yearordinal
        start = i
        for j in range(7):
            dset[i] = i
            i += 1
            if self.wdaymask[i] == self.rrule._wkst:
                break

        return (dset, start, i)

    def ddayset(self, year, month, day):
        dset = [None] * self.yearlen
        i = datetime.date(year, month, day).toordinal() - self.yearordinal
        dset[i] = i
        return (dset, i, i + 1)

    def htimeset(self, hour, minute, second):
        tset = []
        rr = self.rrule
        for minute in rr._byminute:
            for second in rr._bysecond:
                tset.append(datetime.time(hour, minute, second, tzinfo=rr._tzinfo))

        tset.sort()
        return tset

    def mtimeset(self, hour, minute, second):
        tset = []
        rr = self.rrule
        for second in rr._bysecond:
            tset.append(datetime.time(hour, minute, second, tzinfo=rr._tzinfo))

        tset.sort()
        return tset

    def stimeset(self, hour, minute, second):
        return (datetime.time(hour, minute, second, tzinfo=self.rrule._tzinfo),)


class rruleset(rrulebase):
    """ The rruleset type allows more complex recurrence setups, mixing
    multiple rules, dates, exclusion rules, and exclusion dates. The type
    constructor takes the following keyword arguments:
    
    :param cache: If True, caching of results will be enabled, improving
                  performance of multiple queries considerably. """

    class _genitem(object):
        def __init__(self, genlist, gen):
            try:
                self.dt = advance_iterator(gen)
                genlist.append(self)
            except StopIteration:
                pass

            self.genlist = genlist
            self.gen = gen

        def __next__(self):
            try:
                self.dt = advance_iterator(self.gen)
            except StopIteration:
                if self.genlist[0] is self:
                    heapq.heappop(self.genlist)
                else:
                    self.genlist.remove(self)
                    heapq.heapify(self.genlist)

        next = __next__

        def __lt__(self, other):
            return self.dt < other.dt

        def __gt__(self, other):
            return self.dt > other.dt

        def __eq__(self, other):
            return self.dt == other.dt

        def __ne__(self, other):
            return self.dt != other.dt

    def __init__(self, cache=False):
        super(rruleset, self).__init__(cache)
        self._rrule = []
        self._rdate = []
        self._exrule = []
        self._exdate = []

    @_invalidates_cache
    def rrule(self, rrule):
        """ Include the given :py:class:`rrule` instance in the recurrence set
        generation. """
        self._rrule.append(rrule)

    @_invalidates_cache
    def rdate(self, rdate):
        """ Include the given :py:class:`datetime` instance in the recurrence
        set generation. """
        self._rdate.append(rdate)

    @_invalidates_cache
    def exrule(self, exrule):
        """ Include the given rrule instance in the recurrence set exclusion
            list. Dates which are part of the given recurrence rules will not
            be generated, even if some inclusive rrule or rdate matches them.
        """
        self._exrule.append(exrule)

    @_invalidates_cache
    def exdate(self, exdate):
        """ Include the given datetime instance in the recurrence set
        exclusion list. Dates included that way will not be generated,
        even if some inclusive rrule or rdate matches them. """
        self._exdate.append(exdate)

    def _iter(self):
        rlist = []
        self._rdate.sort()
        self._genitem(rlist, iter(self._rdate))
        for gen in [iter(x) for x in self._rrule]:
            self._genitem(rlist, gen)

        exlist = []
        self._exdate.sort()
        self._genitem(exlist, iter(self._exdate))
        for gen in [iter(x) for x in self._exrule]:
            self._genitem(exlist, gen)

        lastdt = None
        total = 0
        heapq.heapify(rlist)
        heapq.heapify(exlist)
        while rlist:
            ritem = rlist[0]
            if not lastdt or lastdt != ritem.dt:
                while exlist and exlist[0] < ritem:
                    exitem = exlist[0]
                    advance_iterator(exitem)
                    if exlist and exlist[0] is exitem:
                        heapq.heapreplace(exlist, exitem)

                if not exlist or ritem != exlist[0]:
                    total += 1
                    yield ritem.dt
                lastdt = ritem.dt
            advance_iterator(ritem)
            if rlist:
                if rlist[0] is ritem:
                    heapq.heapreplace(rlist, ritem)

        self._len = total


class _rrulestr(object):
    _freq_map = {
        "YEARLY": YEARLY,
        "MONTHLY": MONTHLY,
        "WEEKLY": WEEKLY,
        "DAILY": DAILY,
        "HOURLY": HOURLY,
        "MINUTELY": MINUTELY,
        "SECONDLY": SECONDLY,
    }
    _weekday_map = {"MO": 0, "TU": 1, "WE": 2, "TH": 3, "FR": 4, "SA": 5, "SU": 6}

    def _handle_int(self, rrkwargs, name, value, **kwargs):
        rrkwargs[name.lower()] = int(value)

    def _handle_int_list(self, rrkwargs, name, value, **kwargs):
        rrkwargs[name.lower()] = [int(x) for x in value.split(",")]

    _handle_INTERVAL = _handle_int
    _handle_COUNT = _handle_int
    _handle_BYSETPOS = _handle_int_list
    _handle_BYMONTH = _handle_int_list
    _handle_BYMONTHDAY = _handle_int_list
    _handle_BYYEARDAY = _handle_int_list
    _handle_BYEASTER = _handle_int_list
    _handle_BYWEEKNO = _handle_int_list
    _handle_BYHOUR = _handle_int_list
    _handle_BYMINUTE = _handle_int_list
    _handle_BYSECOND = _handle_int_list

    def _handle_FREQ(self, rrkwargs, name, value, **kwargs):
        rrkwargs["freq"] = self._freq_map[value]

    def _handle_UNTIL(self, rrkwargs, name, value, **kwargs):
        global parser
        if not parser:
            from dateutil import parser
        try:
            rrkwargs["until"] = parser.parse(
                value, ignoretz=kwargs.get("ignoretz"), tzinfos=kwargs.get("tzinfos")
            )
        except ValueError:
            raise ValueError("invalid until date")

    def _handle_WKST(self, rrkwargs, name, value, **kwargs):
        rrkwargs["wkst"] = self._weekday_map[value]

    def _handle_BYWEEKDAY(self, rrkwargs, name, value, **kwargs):
        """
        Two ways to specify this: +1MO or MO(+1)
        """
        l = []
        for wday in value.split(","):
            if "(" in wday:
                splt = wday.split("(")
                w = splt[0]
                n = int(splt[1][:-1])
            else:
                if len(wday):
                    for i in range(len(wday)):
                        if wday[i] not in "+-0123456789":
                            break

                    n = wday[:i] or None
                    w = wday[i:]
                    if n:
                        n = int(n)
                    else:
                        raise ValueError("Invalid (empty) BYDAY specification.")
                    l.append(weekdays[self._weekday_map[w]](n))

        rrkwargs["byweekday"] = l

    _handle_BYDAY = _handle_BYWEEKDAY

    def _parse_rfc_rrule(
        self, line, dtstart=None, cache=False, ignoretz=False, tzinfos=None
    ):
        if line.find(":") != -1:
            name, value = line.split(":")
            if name != "RRULE":
                raise ValueError("unknown parameter name")
            else:
                value = line
            rrkwargs = {}
            for pair in value.split(";"):
                name, value = pair.split("=")
                name = name.upper()
                value = value.upper()
                try:
                    getattr(self, "_handle_" + name)(
                        rrkwargs, name, value, ignoretz=ignoretz, tzinfos=tzinfos
                    )
                except AttributeError:
                    raise ValueError("unknown parameter '%s'" % name)
                except (KeyError, ValueError):
                    raise ValueError("invalid '%s': %s" % (name, value))

            return rrule(dtstart=dtstart, cache=cache, **rrkwargs)

    def _parse_rfc(
        self,
        s,
        dtstart=None,
        cache=False,
        unfold=False,
        forceset=False,
        compatible=False,
        ignoretz=False,
        tzinfos=None,
    ):
        global parser
        if compatible:
            forceset = True
            unfold = True
        s = s.upper()
        if not s.strip():
            raise ValueError("empty string")
        if unfold:
            lines = s.splitlines()
            i = 0
            while i < len(lines):
                line = lines[i].rstrip()
                if not line:
                    del lines[i]
                elif i > 0:
                    if line[0] == " ":
                        lines[(i - 1)] += line[1:]
                        del lines[i]
                else:
                    i += 1

        else:
            lines = s.split()
        if not forceset:
            if len(lines) == 1:
                if s.find(":") == -1 or s.startswith("RRULE:"):
                    return self._parse_rfc_rrule(
                        lines[0],
                        cache=cache,
                        dtstart=dtstart,
                        ignoretz=ignoretz,
                        tzinfos=tzinfos,
                    )
                rrulevals = []
                rdatevals = []
                exrulevals = []
                exdatevals = []
                for line in lines:
                    if not line:
                        continue
                    if line.find(":") == -1:
                        name = "RRULE"
                        value = line
                    else:
                        name, value = line.split(":", 1)
                    parms = name.split(";")
                    if not parms:
                        raise ValueError("empty property name")
                    name = parms[0]
                    parms = parms[1:]
                    if name == "RRULE":
                        for parm in parms:
                            raise ValueError("unsupported RRULE parm: " + parm)

                        rrulevals.append(value)
                    else:
                        if name == "RDATE":
                            for parm in parms:
                                if parm != "VALUE=DATE-TIME":
                                    raise ValueError("unsupported RDATE parm: " + parm)

                            rdatevals.append(value)
                        else:
                            if name == "EXRULE":
                                for parm in parms:
                                    raise ValueError("unsupported EXRULE parm: " + parm)

                                exrulevals.append(value)
                            else:
                                if name == "EXDATE":
                                    for parm in parms:
                                        if parm != "VALUE=DATE-TIME":
                                            raise ValueError(
                                                "unsupported EXDATE parm: " + parm
                                            )

                                    exdatevals.append(value)
                                else:
                                    if name == "DTSTART":
                                        for parm in parms:
                                            raise ValueError(
                                                "unsupported DTSTART parm: " + parm
                                            )

                                        if not parser:
                                            from dateutil import parser
                                        dtstart = parser.parse(
                                            value, ignoretz=ignoretz, tzinfos=tzinfos
                                        )
                                    else:
                                        raise ValueError(
                                            "unsupported property: " + name
                                        )

                if (
                    forceset
                    or len(rrulevals) > 1
                    or rdatevals
                    or exrulevals
                    or exdatevals
                ):
                    if not parser:
                        if rdatevals or exdatevals:
                            from dateutil import parser
                    rset = rruleset(cache=cache)
                    for value in rrulevals:
                        rset.rrule(
                            self._parse_rfc_rrule(
                                value,
                                dtstart=dtstart,
                                ignoretz=ignoretz,
                                tzinfos=tzinfos,
                            )
                        )

                    for value in rdatevals:
                        for datestr in value.split(","):
                            rset.rdate(
                                parser.parse(
                                    datestr, ignoretz=ignoretz, tzinfos=tzinfos
                                )
                            )

                    for value in exrulevals:
                        rset.exrule(
                            self._parse_rfc_rrule(
                                value,
                                dtstart=dtstart,
                                ignoretz=ignoretz,
                                tzinfos=tzinfos,
                            )
                        )

                    for value in exdatevals:
                        for datestr in value.split(","):
                            rset.exdate(
                                parser.parse(
                                    datestr, ignoretz=ignoretz, tzinfos=tzinfos
                                )
                            )

                    if compatible:
                        if dtstart:
                            rset.rdate(dtstart)
                    return rset
                return self._parse_rfc_rrule(
                    rrulevals[0],
                    dtstart=dtstart,
                    cache=cache,
                    ignoretz=ignoretz,
                    tzinfos=tzinfos,
                )

    def __call__(self, s, **kwargs):
        return self._parse_rfc(s, **kwargs)


rrulestr = _rrulestr()
